Ok, this might not be too helpful because I tend to want the versatility to play anything, but here goes...
Right now I'm playing in a 6-man setup, 3 guitars, drums, vocals, bass. And sometimes possibly some horns too. We play an array of styles, from reggae to funk to blues to rock. So I suppose I am looking for something that can give me that tight, articulate and somewhat growly funk tone, and also be able to deliver a solid low-end thud of reggae bass, and the strong yet not overdriven rock sound, and of course be capable of a very clear, very up-righty tone. I play music ranging from Bob Marly to The Chili Peppers to the Grateful Dead to The Meters to The Beatles. That wasn't helpful at all, was it?
I would like the rig to be able to cut through said setup on its own in a small to medium sized venue, like a club for example. I'm not too worried about larger venues like a park or auditorium because I will probably have access to stage monitors.
In terms of price, I'd love to not spend more than about $1500, but investing in good equipment is always worth while, so that upper limit has potential to move.
I don't much care about effects or fancy extras, what I'm really interested in is a nice amp with some sturdy cabs, and maybe a power conditioner if that happens to be part of the deal.